| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] difficult [to-vb] [adj] [noun] | 208 |
|
| 2 | be difficult [to-vb] [adj] [noun] | 208 |
|
| 3 | [is] difficult [to-vb] [adj] [noun] | 139 |
|
| 4 | is difficult [to-vb] [adj] [noun] | 128 |
|
| 5 | [be] difficult [to-vb] [adj] [noun sg] | 113 |
|
| 6 | [be] difficult [to-vb] [adj] [noun] | 104 |
|
| 7 | [be] difficult [to-vb] [det] [noun] | 98 |
|
| 8 | [be] difficult [to-vb] [adj] [noun pl] | 91 |
|
| 9 | [be] difficult [to-vb] [adj] [noun] | 35 |
|
| 10 | be difficult [to-vb] [adj] [noun] | 35 |
|
| 11 | [be] difficult [to-vb] any [noun] | 26 |
|
| 12 | [be] difficult [to-vb] any [noun] | 26 |
|
| 13 | [was/were] difficult [to-vb] [adj] [noun] | 23 |
|
| 14 | was difficult [to-vb] [adj] [noun] | 23 |
|
| 15 | [be] difficult [to-vb] this [noun] | 20 |
|
| 16 | [be] difficult [to-vb] this [noun] | 20 |
|
| 17 | [be] difficult to find [adj] [noun] | 19 |
|
| 18 | [be] difficult [to-vb] these [noun] | 15 |
|
| 19 | [be] difficult [to-vb] these [noun] | 15 |
|
| 20 | [be] difficult [to-vb] that [noun] | 14 |
|
| 21 | [be] difficult [to-vb] that [noun] | 14 |
|
| 22 | [be] difficult to obtain [adj] [noun] | 13 |
|
| 23 | [been] difficult [to-vb] [adj] [noun] | 11 |
|
| 24 | 's difficult [to-vb] [adj] [noun] | 11 |
|
| 25 | been difficult [to-vb] [adj] [noun] | 11 |
|
| 26 | [be] difficult to get [adj] [noun] | 10 |
|
| 27 | [be] difficult [to-vb] such [noun] | 9 |
|
| 28 | [be] difficult [to-vb] such [noun] | 9 |
|
| 29 | [be] difficult to imagine [adj] [noun] | 7 |
|
| 30 | [be] difficult [to-vb] [adj] evidence | 6 |
|
